Several skills in this build get synergy from crits, such as:
1. Strafe with Alabastar rune
2. Impale with Alabastar rune
3. Archery (hand xbows)
Marked for Death buffs damage against bosses.
Multishot provides aoe.
Ferret companion actually adds +40% gold drops. That seems like a lot.
The mobility of strafe is one of the main defenses in this build.
Brooding is used for healing and Smoke screen for escapes.
Let me know what you think!